Quick opening carton



Sept. 24, 1935. D, A. sNYDER QUICK OPENING CARTON Filed Oct. 12, 1934@mm/W@ Patented Sept. 24, 1935 UNITED STATES PATENT OFFICE MarathonPaper Mills Company, Rothschild,

Wis., a corporation of Wisconsin Application October 12, 1934, SerialNo. 747,995

An object of this invention is to provide an improved form of cartonparticularly adapted for holding ice cream arid the like, and which canbe readily opened by an operator so as to permit the ice cream containedtherein to be removed as a block and transferred to a dish.

Another object is to provide an improved form of carton folded from a atblank wherein the portions of the carton forming the inner flaps willmutually support each other, and will assemble to form a carton which issmooth on the inside and without any protuberances or depressions.

These and other objects, as` will hereinafter appear, 'are accomplishedby this invention which is fully described in the followingspecification and shown in the accompanying drawing, in which- Figure 1is a perspective view and assembled carton embodying the invention;

' Fig. 2 is a somewhat enlarged vertical section on the line 2 of Fig.1;

. Fig. 3 is a plan view of the blank in which the carton is folded; and

Fig. 4 is a partial enlarged perspective view of the carton during thefolding operation.

The embodiment illustrated comprises a carton formed from a blank, asshown in Fig. 3, having a bottom I0, opposing sides II and I2 formedintegral with the bottom but separated therefrom by fold The bottom alsohas bottom flaps I3, I4 at opposite sides of the rectangular bottom,while the side II has inner flaps I5, I6 separated therefrom by foldlines, 'and the vside I2 has outer 'side flaps I1; I8 also separatedtherefrom by fold lines, the flaps I3, I 4 being severed from the flapsI1, I8 on the lines I9, I9.

The side II has a coverap 20, and the side I2l .p

has an overlying flap 2I also separated by fold lines. The outer sideflaps I1 and I3 have locking flaps 22, 23 which are adapted tooverlieand to form an interlock'for holding the carton in assembledposition. The side flap I3 is provided with a diagonal edge I3 and atransverse edge I3", preferably parallel to the bottom of the bottomflap, while the side flap' I5 has two edges I5", |51* cut to match theedges I38L and I3, respectively. Thus when the flaps I3 and I5 are movedinto the same plane and into'the position which they assume in thecarton when folded for use, these cut edges match. The same is true ofthe flaps I4 and I5. Fig. 4 shows the flaps I3,

I5 just before they have assumed their nal position, while Fig. 2 showsthem in the final position' gherein a tight joint is providedvbetweenthese aps.

A narrow strip of glue, cement, or the like, 24 is applied verticallythrough the flaps I5 and I3, and preferably has an angle strip 25 at the5 bottom which terminates at the lower outer corner so as to cover theinner portion of the joint formed between the edges I3a-and 15. At thesame time a spot of glue 26 is applied to the upper outer portion of theflap I5 so-that when the 10 outer ap I1 is folded over the flaps I3, I5and pressed down, it will be held by the strips of gluev 24 and 25 andby the spot 26. Glue is similarly applied to the flaps I4 and I6, andthe outer flap I8 is pressed down thereover and heldin the l5 same wayas the flap Il. The carton is then ready for lling.

' When filledl with ice cream or the like, the cover flap 20 is presseddown after which the overlying iiap 2i is pressed down upon the ice 20cream `and upon the nap 20. The locking aps 22, 23 are then folded overand interlocked, thereby completely closing and fastening the package.

The ice cream if properly frozen can then be readilyremoved as a lblockor cake from: the 25 carton by the operator who preferably holds thecarton with his two hands with the side I I toward him, the carton beingin an upright position. He unlocks the flaps 22, 23 and folds them back,holding the ap 22 between the thumb and index iinger of his right hand,while the flap 23 is held between the thumb and index nger of the lefthand. While gripping these locking flaps he pulls outwardly on them soas to break the adhesion caused by the spot of glue 26 at each 35 side,and continuing to pull breaks the adhesion along the strips 24, 25 so asto permit the outer aps I'I, I8 to` swing entirely clear of the flapsI3, I5 on the one side and I4, I6 on the other. At the same time thepull on the vertical strip 40 of adhesive 24 draws the inner flaps awayfrom the block of ice cream, so that by setting the package on a flatsurface the remaining portions of the carton still incontact with theice cream can readily be drawn away from it, and the block of ice creamlifted therefrom by means of a spatula, or the like.

The at portions I3, lil? engage to stiften the walls of the carton andprevent any parts from protruding into the carton to be caught by thecake of ice cream. or by anything inserted into the carton.

I claim: v Y

l. A folded cardboard carton comprising a bottom and opposite sidemembers connected together by overlapping aps including an outer sideflap, a narrow strip of adhesive connecting the overlapping surfaces ofthe flaps when assembled, and adhering to the inner face of the outerside ap along a strip near its longitudinal center to a point near thebottom of the carton and extending therefrom at an angle to the outerlower corner of the outer side flap, and a spot of adhesive connectingthe outer upper corner of the outer side ap to the flap beneath andadapted to be broken by a pull on the outer flap.

2. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom having bottom flaps on opposite sides thereof, andthe side members having side flaps on opposite sides thereof, each outerside flap overlapping the associated inner side flap and associatedbottom flap, a narrow strip of adhesive for each overlapped set of flapsconnecting the overlapping surfaces thereof and extending longitudinallyof the inner face of the outer ap near its center and terminating in asection extending angularly from' the bottom of the longitudinal stripto the outer lower corner of the outer flap, and a spot of adhesiveconnecting the outer upper corner of each outer side flap to the apbeneath and adapted to be broken by a pull on the connected outer sideflap.

3. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom having bottom naps and the side members having sideflaps, the side aps overlapping in folded relation, each outer side apoverlapping the opposing side flap and bottom flap, the last named apslying in the same plane adjacent the outside flap, anarrow strip ofadhesive connecting the overlapping surfaces of the aps when assembledand adhering to and extending longitudinally of the outer flap near itscenter and terminating in a strip of adhesive extending from the bottomof the longitudinal strip to the outer lower corner of the outer flap,and a spot of adhesive connecting each outer upper corner of each outerap to the flap beneath and adapted to be broken by a pull on the outerflap.

4. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom having bottom naps and the side members having sideflaps, the side flaps overlapping in folded relation, each outer sideflap overlapping the opposing side ap and bottom flap, the last namedflaps lying in the same plane adjacent the outside flap and having theirmeeting edges contacting through substantially their entire length, anarrow strip of adhesive connecting the overlapping surfaces of the apswhen assembled and adhering to and extending longitudinally of the outerflap near its center and terminating in a strip of adhesive extendingfrom the bottom of the longitudinal strip to the outer lower corner ofthe outer flap, and a spot of adhesive connecting each outer uppercorner of each outer flap to the nap beneath and adapted to be broken bya pull on the outer ap.

5. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom having bottom flaps and the side members havinginner and outer side flaps, the side flaps overlapping in foldedrelation, each bottom ilap forming a trapezoid having an edge parallelto the bottom of the flap and an edge making an acute angle with thebottom of the flap, the inner side flap each having a complementaryreentrant edge in abutting relation to the edge of the associated bottomflap when the two flaps are in the same plane and overlapped by theassociated outer side ap, and means for gluing the flaps to form acarton.

6. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom outer side ap, and means for gluing the flaps toform a carton, the glue securing the outer lower corner of the outerflap to the inner flap and to the bottom flap at their diagonaljunction.

7. A folded cardboard carton comprising a bottom and opposite sidemembers, the bottom having bottom flaps and the side members havinginner and outer side aps, the side flaps overlapping in folded relation,each bottom flap forming a trapezoid having an edge parallel to thebottom of the ap and an edge making an acute angle with the bottom ofthe ap, the diagonal line thus formed running to the outer lower cornerof the bottom flap the inner side flap being cut to t the said edges ofthe bottom nap when the two flaps are in the same plane, a n'arlowL-shaped line of adhesive connecting the overlapping surfaces of theilaps and extending longitudinally of -each outer flap and having anextension to the outer lower corner of the outer flap, and a spot ofadhesive connecting the outer upper corner of each outer flap to theflap beneath.

8. A folded cardboard carton including a bottom and opposite sidemembers, th-e bottom having a bottom ap and each of the side membershaving a side flap adapted to be associated with the other to provideinner and outer side aps overlapping one another when the carton isassembled, the bottom flap having an oblique side edge making an acuteangle with the bottom of the ap at one ofthe corners of the bottom, an

-outer edge cut at a substantial angle to the oblique side edge and anopposite side edge running at a substantial angle from the terminus ofthe outer edge back to the opposite corner of the bottom, the inner sideflap being provided with a complementary cut to closely t in abuttedrelation against the rst two aforementioned edges of the bottom ap whenthe bottom flap and the r inner side ap are in the same plane with theouter side flap in overlapping relation thereto, and means for gluingthe flaps together.

9. A folded cardboard carton including a bottom and opposite sidemembers, the bottom having a bottom flap and each of the side membershaving a side flap adapted to be associated with the other to provideinner and outer side flaps overlapping one another when the carton isassembled, the bottom flap having an oblique edge starting at the corneradjacent to the side flap, the outer continuation of thisedge extendingin a direction generally parallel to the bottom of the bottom flap, thebottom ap and inner side flap having complementary meeting edges so thatthe two t throughout substantially their entire meeting length in edgeabutting relation, and means for gluing the flaps together.

10. A cardboard carton including sections folded into angular relationwith respect to one another, each of said sections having a ap extendingtherefrom at an angle thereto, said aps lying in the same plane and inbutt edge relation and complementing one another in affording a 5 wallelement for said carton, said flaps having their meeting edgesrespectively cut, the one to afford a. protuberant edge and the other a.complementary reentrant edge, said edges being in interfitting relationto one another and interlocked against slipping movement while incontact in the same plane, and the carton being also provided with anouter portion overlying the abutted flaps and secured thereto tomaintain them in abutting intertted relation within the same piane.

DONALD A. SNYDER.

